A post today on Letter's Of Note features a conversation between cartoonist Harry G. Peter and Dr. William Marston, better known by comics readers by his pen name Charles Moulton, and by historians for inventing the systolic blood pressure test (which would later become a major component of the modern lie detector test). Peter, at the ripe old age of 61, was charged with bringing Wonder Woman to life and illustrated her adventures until his passing in 1958.

In the letter pictured below, you can see Peter and Marston discussing the finer points of Diana Prince's costume, most notably the eagle, which was a staple of Wonder Woman's costume until the recent, and hopefully temporary, redesign by Jim Lee.